There is a stone trough in my house. What is this for?

The stone trough is about 80 cm long, 40 cm wide and 15 cm deep. This is a typical trough for raising pigs. Almost every family in my hometown has it. Cattle and horses are longer than this, but the stone foundation with ancient houses does not have this width. The walls of the house are made of wood, and the foundation is made of slotted stones. Generally, the foundations of walls are long and narrow, and the grooves of columns are round.